/// <summary>
/// Processes the headers.
/// It's invoked because of "headers" or "cmpctblock" message
/// </summary>
/// <param name="headers">The headers.</param>
/// <returns></returns>
private async Task <bool> ProcessHeadersAsync(BlockHeader[] headers)
{
int protocolVersion = PeerContext.NegotiatedProtocolVersion.Version;
int headersCount = headers.Length;
if (headersCount == 0)
{
logger.LogDebug("Peer didn't returned any headers, let's assume we reached its tip.");
return(true);
}
using (GlobalLocks.ReadOnMainAsync().GetAwaiter().GetResult())
{
if (await HandleAsNotConnectingAnnouncementAsync(headers).ConfigureAwait(false))
{
// fully handled as non connecting announcement
return(true);
}
// compute hashes in parallel to speed up the operation and check sent headers are sequential.
Parallel.ForEach(headers, header =>
{
header.Hash = _blockHeaderHashCalculator.ComputeHash(header, protocolVersion);
});
}
// Ensure headers are consecutive.
for (int i = 1; i < headersCount; i++)
{
if (headers[i].PreviousBlockHash != headers[i - 1].Hash)
{
Misbehave(20, "Non continuous headers sequence.");
return(false);
}
}
//enqueue headers for validation
await _headerValidator.RequestValidationAsync(new HeadersToValidate(headers, PeerContext)).ConfigureAwait(false);
return(true);
}
protected UInt256 ComputeHash(BlockHeader header)
{
return(_blockHeaderHashCalculator.ComputeHash(header, protocolVersion: 0)); //protocol version doesn't matter for hash
}